Mechanical properties, long-term hydration heat, shinkage behavior and crack resistance of dam concrete designed with low heat Portland (LHP) cement and fly ash

Wang, Lei; Yang, Hua-Qian; Zhou, Shi Hua; Chen, E.; Tang, Shengwen

doi:10.1016/j.conbuildmat.2018.08.056

Cited by 105 publications

(51 citation statements)

References 90 publications

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“…The coarse aggregate used is crushed granite with diameter of 5-40 mm. The density of coarse aggregate is 2.68 g/cm 3 . Fine aggregate is also crushed granite with a fineness modulus of 2.8 and a density of 2.67 g/cm 3 .…”

Section: Raw Materialsmentioning

confidence: 99%

“…Wudongde arch dam (in Sichuan, 270 m), Liangjiangkou rockfill dam (in Sichuan, 295 m), Shuangjiangkou rockfill dam (in Sichuan, 315m), etc., are being built in southwestern China 3,4 . In the next few years, more and more huge dams will be constructed in Sichuan, Yunnan and Tibet.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the erosion and abrasion damages of concrete in spillway, the flood discharge tunnel and the overflow surface of the hydropower stations are very common in the worldwide [5][6][7] . The abrasion resistance of concrete is therefore one of the most important factors determining the reliability even the safety of the dams, which has gained great research interests in recent decades 3,[5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

“…proper mixture proportion and improved curing conditions, and so on. 3,[5][6][7][8][9][10][11] . Among all the methods proposed above, enhancement of the concrete strength is usually considered to be the most effective one, because there is a linear relationship between the abrasion resistance and the compressive strength of concrete 6,12 .…”

Section: Introductionmentioning

confidence: 99%

“…Due to its dilution effect and almost inert nature at early age, fly ash can decrease the shrinkage and internal temperature rising and improve the durability of concrete [20][21][22] . As a result, fly ash is widely used in hydraulic mass concrete to reduce or prevent the early cracking risk 3,6,12 . Many authors 6,8,23 have evaluated the influence of fly ash on the compressive strength and abrasion resistance of concrete, and found that an appropriate addition of fly ash (no more than 25 %) favors the development of strength and the abrasion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

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Dam concrete suffers from serious abrasion damages in southwestern China, the abrasion resistance of concrete is therefore one of the most important factors determining the reliability even the safety of the dams. In the present work, the effects of fly and/or silica fume on the mechanical properties, drying shrinkage, as well the cracking and abrasion resistance of concrete were investigated, then the pore structures of concrete added with fly ash and silica fume and the pore surface fractal dimensions (Ds) were determined by the mercury intrusion porosimetry (MIP) method and a fractal model, respectively. Finally, the relationships between the abrasion resistance of concrete and the porosity as well as the Ds were revealed and discussed. The results indicate that silica fume significantly increases the drying shrinkage especially at early age, while the incorporation of fly ash and silica fume together can decease the early plastic shrinkage-induced cracking risk and the final shrinkage to some degrees. Besides, the utilization of 5 wt% silica fume and 20 wt% fly ash together increases the abrasion resistance and mechanical property by about 4-9 % at various ages. In addition, the compressive strength and the abrasion resistance of concrete are linearly correlated with the concrete porosity and the Ds. Both the fly ash and silica fume could decrease the porosity of concrete and increase the Ds, therefore the concrete containing fly ash

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Section: Raw Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

et al. 2021

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A novel strength prediction model of mortars with different types of cement and SCMs

Sun

Zhao

Cai

et al. 2021

Structural Concrete

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Based on fib Model Code 2010, a time-dependent strength prediction model was improved by reconsidering the coefficient s for the cementitious materials with different types of cement and mix proportions. The relationship between s and mineral composition was investigated experimentally. The results indicate that the values of s show an approximately linear decreasing tendency with the C 3 S + C 3 A content in cement. An empirical function was proposed to describe the variation of s with different water-to-binder (W/b) ratio and different ratios of ground granulated blast furnace slag (GGBS) and fly ash (FA) to the binder, GGBS/b and FA/b ratio. Based on regression analysis, the proposed function presented a correlation of the variation of s with W/b ratios and/or SCM/b ratios. Through the new modified strength prediction model, the predicted results of the compressive strengths of mortars were compared to the experimental results in this study and previous studies. The results show that the new model can provide an accurate evaluation of the early-age strength development of cementitious materials.

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Structural inverse analysis of concrete dams: considering residual hydration heat effect on dam displacements

Yang

Wen

Yan

et al. 2022

Engineering with Computers

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Mechanical properties, long-term hydration heat, shinkage behavior and crack resistance of dam concrete designed with low heat Portland (LHP) cement and fly ash

Cited by 105 publications

References 90 publications

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

A novel strength prediction model of mortars with different types of cement and SCMs

Structural inverse analysis of concrete dams: considering residual hydration heat effect on dam displacements

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